I am concerned about taking a taxi as the 20 euro rate seems to be to the center of town. I don't know what the extra charge would be to the San Niccolo area and I would be at the mercy of the driver. Also, I don't want to withdraw money from an ATM at the airport. There just seem to be too many unknowns and potential problems with taxis from what I have read.
I have traveled Internationally quite extensively, and have had some problems with taxis. This spring in Istanbul, I had been walking for a few hours and decided to get a cab back to my hotel although it was only a about a half a mile. Before I got into a taxi, I told the driver where I wanted to go and asked the the cost. He gave me a price. I agreed. After we had gone about a block, he doubled the price because there was "traffic". In my best Turkish, I asked him when there was not traffic in Istanbul and said I would get if he didn't agree to the original price. We argued all the way. He drove like a mad man - wrong side of the street when he could, in and out of traffic. He took me where I wanted to go - I paid him what we agreed upon and he took off almost before I got out.
My hotel will provide a driver for 40 euros but that seemed high for such a short distance. I did find a private drive company that charges 30 euros but would prefer a company that someone has used and could recommend. I just thought someone might have used a transportation company that they could recommend.
Thanks,
Sharon